--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/backend/plugins/plugin_exp_command_export.py	Fri Jun 02 11:49:51 2023 +0200
@@ -0,0 +1,167 @@
+#!/usr/bin/env python3
+
+
+# SAT plugin to export commands (experimental)
+# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from libervia.backend.core.i18n import _
+from libervia.backend.core.constants import Const as C
+from libervia.backend.core.log import getLogger
+
+log = getLogger(__name__)
+from twisted.words.protocols.jabber import jid
+from twisted.internet import reactor, protocol
+
+from libervia.backend.tools import trigger
+from libervia.backend.tools.utils import clean_ustr
+
+PLUGIN_INFO = {
+    C.PI_NAME: "Command export plugin",
+    C.PI_IMPORT_NAME: "EXP-COMMANS-EXPORT",
+    C.PI_TYPE: "EXP",
+    C.PI_PROTOCOLS: [],
+    C.PI_DEPENDENCIES: [],
+    C.PI_MAIN: "CommandExport",
+    C.PI_HANDLER: "no",
+    C.PI_DESCRIPTION: _("""Implementation of command export"""),
+}
+
+
+class ExportCommandProtocol(protocol.ProcessProtocol):
+    """ Try to register an account with prosody """
+
+    def __init__(self, parent, client, target, options):
+        self.parent = parent
+        self.target = target
+        self.options = options
+        self.client = client
+
+    def _clean(self, data):
+        if not data:
+            log.error("data should not be empty !")
+            return ""
+        decoded = data.decode("utf-8", "ignore")[: -1 if data[-1] == "\n" else None]
+        return clean_ustr(decoded)
+
+    def connectionMade(self):
+        log.info("connectionMade :)")
+
+    def outReceived(self, data):
+        self.client.sendMessage(self.target, {"": self._clean(data)}, no_trigger=True)
+
+    def errReceived(self, data):
+        self.client.sendMessage(self.target, {"": self._clean(data)}, no_trigger=True)
+
+    def processEnded(self, reason):
+        log.info("process finished: %d" % (reason.value.exitCode,))
+        self.parent.removeProcess(self.target, self)
+
+    def write(self, message):
+        self.transport.write(message.encode("utf-8"))
+
+    def bool_option(self, key):
+        """ Get boolean value from options
+        @param key: name of the option
+        @return: True if key exists and set to "true" (case insensitive),
+                 False in all other cases """
+        value = self.options.get(key, "")
+        return value.lower() == "true"
+
+
+class CommandExport(object):
+    """Command export plugin: export a command to an entity"""
+
+    # XXX: This plugin can be potentially dangerous if we don't trust entities linked
+    #      this is specially true if we have other triggers.
+    # FIXME: spawned should be a client attribute, not a class one
+
+    def __init__(self, host):
+        log.info(_("Plugin command export initialization"))
+        self.host = host
+        self.spawned = {}  # key = entity
+        host.trigger.add("message_received", self.message_received_trigger, priority=10000)
+        host.bridge.add_method(
+            "command_export",
+            ".plugin",
+            in_sign="sasasa{ss}s",
+            out_sign="",
+            method=self._export_command,
+        )
+
+    def removeProcess(self, entity, process):
+        """ Called when the process is finished
+        @param entity: jid.JID attached to the process
+        @param process: process to remove"""
+        try:
+            processes_set = self.spawned[(entity, process.client.profile)]
+            processes_set.discard(process)
+            if not processes_set:
+                del (self.spawned[(entity, process.client.profile)])
+        except ValueError:
+            pass
+
+    def message_received_trigger(self, client, message_elt, post_treat):
+        """ Check if source is linked and repeat message, else do nothing  """
+        from_jid = jid.JID(message_elt["from"])
+        spawned_key = (from_jid.userhostJID(), client.profile)
+
+        if spawned_key in self.spawned:
+            try:
+                body = next(message_elt.elements(C.NS_CLIENT, "body"))
+            except StopIteration:
+                # do not block message without body (chat state notification...)
+                return True
+
+            mess_data = str(body) + "\n"
+            processes_set = self.spawned[spawned_key]
+            _continue = False
+            exclusive = False
+            for process in processes_set:
+                process.write(mess_data)
+                _continue &= process.bool_option("continue")
+                exclusive |= process.bool_option("exclusive")
+            if exclusive:
+                raise trigger.SkipOtherTriggers
+            return _continue
+
+        return True
+
+    def _export_command(self, command, args, targets, options, profile_key):
+        """ Export a commands to authorised targets
+        @param command: full path of the command to execute
+        @param args: list of arguments, with command name as first one
+        @param targets: list of allowed entities
+        @param options: export options, a dict which can have the following keys ("true" to set booleans):
+                        - exclusive: if set, skip all other triggers
+                        - loop: if set, restart the command once terminated #TODO
+                        - pty: if set, launch in a pseudo terminal
+                        - continue: continue normal message_received handling
+        """
+        client = self.host.get_client(profile_key)
+        for target in targets:
+            try:
+                _jid = jid.JID(target)
+                if not _jid.user or not _jid.host:
+                    raise jid.InvalidFormat
+                _jid = _jid.userhostJID()
+            except (RuntimeError, jid.InvalidFormat, AttributeError):
+                log.info("invalid target ignored: %s" % (target,))
+                continue
+            process_prot = ExportCommandProtocol(self, client, _jid, options)
+            self.spawned.setdefault((_jid, client.profile), set()).add(process_prot)
+            reactor.spawnProcess(
+                process_prot, command, args, usePTY=process_prot.bool_option("pty")
+            )